修复 EasyOCR 连续启动失败不触发重启的问题：

- 新增 _easyocr_consecutive_startup_failures 计数器，跟踪子进程无法启动的次数
- 当连续3次启动失败时，清除冷却时间并重置状态，强制重试启动
- 前2次保留冷却（预留初始化时间），第3次强制清除冷却
- 在所有重置 _easyocr_consecutive_failures 的地方同步重置启动失败计数
- 解决 EasyOCR 全程未启动但从未触发杀进程重启的问题

monitor.py

@@ -353,6 +353,9 @@ class MessageMonitor:
         # EasyOCR 连续失败计数：前2次保留子进程（预留初始化时间），第3次杀进程重来
         self._easyocr_consecutive_failures: int = 0
         self._easyocr_max_failures: int = 3  # 连续3次失败后杀进程
+        # EasyOCR 连续启动失败计数：子进程无法启动时递增，达到阈值时清除冷却重试
+        self._easyocr_consecutive_startup_failures: int = 0
+        self._easyocr_max_startup_failures: int = 3  # 连续3次启动失败后清除冷却
         # EasyOCR CUDA 错误计数：≥2 次 OOM/kernel error → 下次启动强制 CPU（防冻结）
         self._easyocr_cuda_oom_count: int = 0
         # 引擎选择计数器
@@ -420,6 +423,7 @@ class MessageMonitor:
         self._easyocr_retry_until = 0.0  # 清除崩溃冷却
         self._easyocr_call_count = 0
         self._easyocr_consecutive_failures = 0  # ⭐ 清除连续超时计数（stop/急停后不残留）
+        self._easyocr_consecutive_startup_failures = 0  # ⭐ 清除连续启动失败计数
         
         # ⭐ 彻底重启时重新检测内存，尝试恢复GPU模式
         # 急停/手动停止恢复时保持上次状态，不重新检测
@@ -491,6 +495,7 @@ class MessageMonitor:
         self._easyocr_retry_until = 0.0  # 清除崩溃冷却
         self._easyocr_call_count = 0
         self._easyocr_consecutive_failures = 0  # ⭐ 清除连续超时计数（stop/急停后不残留）
+        self._easyocr_consecutive_startup_failures = 0  # ⭐ 清除连续启动失败计数
         self._easyocr_cuda_oom_count = 0  # 重启后重新评估 GPU/CPU
 
         # 释放钩子回调引用（防止 GC 延迟导致卸载后崩溃）
@@ -658,6 +663,7 @@ class MessageMonitor:
         self._easyocr_retry_until = 0.0  # 清除崩溃冷却
         self._easyocr_call_count = 0
         self._easyocr_consecutive_failures = 0  # 清除连续超时计数
+        self._easyocr_consecutive_startup_failures = 0  # 清除连续启动失败计数
         self._easyocr_cuda_oom_count = 0  # 清除 CUDA 错误计数（不继承本次降级）
         self._last_screenshot_hash.clear()
         self._ocr_unchanged.clear()
@@ -1498,6 +1504,7 @@ class MessageMonitor:
                 payload = json.loads(line)
                 if payload.get("ready"):
                     logger.debug("[ocr] EasyOCR 子进程就绪")
+                    self._easyocr_consecutive_startup_failures = 0  # 成功启动，重置启动失败计数
                     return True
             except Exception:
                 pass
@@ -1529,6 +1536,21 @@ class MessageMonitor:
         import base64
 
         if not self._ensure_easyocr_subprocess():
+            # ⭐ 连续启动失败计数：子进程无法启动时递增，达到阈值时清除冷却重试
+            self._easyocr_consecutive_startup_failures += 1
+            if self._easyocr_consecutive_startup_failures >= self._easyocr_max_startup_failures:
+                logger.warning(f"[ocr] EasyOCR 连续{self._easyocr_consecutive_startup_failures}次启动失败，"
+                               f"清除冷却({int(self._easyocr_retry_until - time.time())}s)并重置状态，强制重试")
+                # 清除冷却时间，强制重试启动
+                self._easyocr_retry_until = 0.0
+                # 重置进程状态
+                self._easyocr_proc = None
+                self._easyocr_broken = False
+                # 重置计数器（避免无限循环）
+                self._easyocr_consecutive_startup_failures = 0
+            else:
+                logger.debug(f"[ocr] EasyOCR 第{self._easyocr_consecutive_startup_failures}次启动失败，"
+                             f"保留冷却({int(self._easyocr_retry_until - time.time())}s)")
             return None
 
         try:
@@ -1581,6 +1603,7 @@ class MessageMonitor:
                                     pass
                                 self._easyocr_proc = None
                                 self._easyocr_consecutive_failures = 0
+                                self._easyocr_consecutive_startup_failures = 0  # 重置启动失败计数
                             else:
                                 logger.debug(f"[ocr] EasyOCR 第{self._easyocr_consecutive_failures}次超时({timeout}s)，保留子进程不杀")
                         return None
@@ -1596,6 +1619,7 @@ class MessageMonitor:
             if result.get("ok"):
                 # 成功 → 重置连续失败计数
                 self._easyocr_consecutive_failures = 0
+                self._easyocr_consecutive_startup_failures = 0  # 成功启动，重置启动失败计数
                 # 计数 + 主动重启：EasyOCR GPU 内存泄漏累积 → OOM → 冻结
                 self._easyocr_call_count += 1
                 if self._easyocr_call_count >= self._easyocr_max_calls: